I set bitrate to 0 or whatever. It plays no role in this case (I tested it). I use different codec (mpeg4, mpeg2video). No difference. -- View this message in context: http://libav-users.943685.n4.nabble.com/how-to-use-qscale-in-lib-av-api-tp4657440p4657442.html Sent from the libav-users mailing list archive at Nabble.com.